Ground terminal, cover assembly and motor comprising same

ABSTRACT

An embodiment of the present invention relates to a cover assembly and a motor comprising same, the cover assembly comprising: a cover plate; a ground terminal disposed on the cover plate; and a capacitor connected to the ground terminal by means of a wire. The ground terminal comprises: a body unit; a ground unit bent from one area of the upper end of the body unit to a first direction; clip units extending from both sides of the body unit to a second direction which is opposite from the first direction; and a coupling unit extending from the lower part of the body unit. The wire is coupled to the clip units by means of insertion. Accordingly, the present invention enables the wire of the capacitor to be fixed in a temporarily assembled state and thus enables an automation process during assembly of the motor.

TECHNICAL FIELD

The present invention relates to a ground terminal, a cover assembly,and a motor including the same.

BACKGROUND ART

Generally, a motor includes a rotating shaft which is rotatablydisposed, a rotor coupled to the rotating shaft, and a stator fixed toan inner surface of the housing, and the stator is installed to bespaced apart from the rotor along a circumference of the rotor.

The motor induces rotation of the rotor through electric interaction.When a coil is wound around the rotor, a commutator and a brush areprovided to supply a current to the coil wound around the rotatingrotor.

Generally, the commutator is coupled to the rotating shaft in a state ofbeing connected to the coil and rotates, and the brush is coupled to thehousing and disposed to be in contact with the commutator. Here, thebrush comes into contact with the commutator and supplies electricity.

In the commutator, since polarity portions are formed at fine intervalsto induce an instantaneous change in an electrode, a spark dischargeoccurs when the polarity portions are frictionally connected to thebrush, and thus noise is generated. In order to prevent the noise, afilter is installed.

The filter may include a capacitor. The capacitor has to emit the noisethrough a ground terminal. To this end, a wire of the capacitor isconnected to the ground terminal. Here, the wire of the capacitor isdirectly welded while being placed on the ground terminal.

Accordingly, a problem may occur wherein the wire of the capacitor isseparated from the ground terminal by an external force.

TECHNICAL PROBLEM

The present invention is directed to providing a ground terminal and acover assembly, which have an improved coupling force with respect to awire of a capacitor, and a motor including the same.

Problems desired to be solved by the present invention are not limitedto the above-described problems, and other problems not mentioned abovemay be clearly understood by those skilled in the art from below.

TECHNICAL SOLUTION

One aspect of the present invention provides a ground terminal includinga body unit, a ground unit bent in one region of an upper portion of thebody unit in a first direction, clip units extending from both sides ofthe body unit in a second direction which is a direction opposite to thefirst direction, and a coupling unit extending from a lower portion ofthe body unit, wherein each of the clip units includes a body which hasa plate shape and is connected to the body unit, two protruding unitsdisposed to be spaced apart from each other at an upper portion of thebody, and a seating groove which is formed between the protruding unitsand into which a wire is inserted.

The clip unit may further include fixing units protruding from theprotruding units in directions which face each other.

Another aspect of the present invention provides a ground terminalincluding a body unit, a ground unit formed in the body unit, a clipunit formed in the body unit, and a coupling unit formed in the bodyunit, wherein a part of the body unit is cut and bent in a firstdirection to form the ground unit, and a part of the body unit is bentin a second direction which is a direction different from the firstdirection to form the clip unit into which a wire is inserted.

The clip unit may include a first clip and a second clip, which aredisposed on both sides of the ground unit.

The first and second clips may be bent from an upper end of the bodyunit.

The first and second clips may be bent from a lower end of the bodyunit.

The first and second clips may be bent from side ends of the body unit.

The first and second clips may be formed by cutting and bending a partof the body unit.

The ground unit may be formed at a center of the body unit in a widthdirection.

The coupling unit may be formed to be coplanar with the body unit.

The coupling unit may further include a protrusion having a sawtoothshape.

Still another aspect of the present invention provides a cover assemblyincluding a cover plate, a ground terminal disposed on the cover plate,and a capacitor electrically connected to the ground terminal through awire, wherein the ground terminal includes a body unit, a ground unitbent in one region of an upper portion of the body unit in a firstdirection, clip units extending from both sides of the body unit in asecond direction which is a direction opposite to the first direction,and a coupling unit extending from a lower portion of the body unit,wherein each of the clip units includes a body which has a plate shapeand is connected to the body unit, two protruding units disposed to bespaced apart from each other at an upper portion of the body, and aseating groove disposed between the protruding units, wherein the wireis seated in the seating groove.

The wire may be coupled to the clip units in an inserted and fittedmanner.

The clip unit may further include fixing units protruding from theprotruding units in directions which face each other.

The ground unit may be formed at a center of the body unit in alongitudinal direction.

The coupling unit may be formed to be coplanar with the body unit.

The coupling unit may further include a protrusion having a sawtoothshape.

The cover plate may further include a guide groove configured to guidecoupling of the ground terminal when the coupling unit is coupled to thecoupling groove.

The guide groove may be formed in a C-shape.

Yet another aspect of the present invention provides a cover assemblyincluding a cover plate, a brush assembly coupled to the cover plate, aground terminal coupled to the cover plate, and a capacitor coupled tothe cover plate and connected to the ground terminal and the brushassembly, wherein the ground terminal includes a body unit, a groundunit formed by cutting a part of the body unit and bending in a firstdirection, a clip unit formed by bending a part of the body unit in asecond direction which is a direction different from the firstdirection, and to which a wire is coupled by being inserted, and acoupling unit extending from the body unit and including a protrusion.

The cover plate may include a coupling groove which is concavely formedand into which the coupling unit is inserted.

The cover plate may further include a guide groove configured to guidecoupling of the ground terminal when the coupling unit is coupled to thecoupling groove.

The cover assembly may further include a connector to which an externalpower source is connected, and a terminal disposed in the connector maybe electrically connected to the capacitor.

The terminal may be disposed to pass through the cover plate.

Yet another aspect of the present invention provides a motor including:a rotating shaft; a rotor coupled to the rotating shaft; a commutatorcoupled to the rotating shaft; a stator disposed outside the rotor; ahousing accommodating the rotor, the commutator, and the stator; and acover assembly which covers the housing, wherein the cover assemblyincludes a cover plate, a brush assembly disposed on the cover plate tobe in contact with the commutator, a ground terminal disposed on thecover plate, and a capacitor connected to the ground terminal through awire, wherein the ground terminal includes a body unit, a ground unitbent from one region of an upper portion of the body unit in a firstdirection, clip units extending from both sides of the body unit in asecond direction which is a direction opposite to the first direction,and a coupling unit extending from a lower portion of the body unit,wherein each of the clip units includes a body which has a plate shapeand is connected to the body unit, two protruding units disposed to bespaced apart from each other at an upper portion of the body, and aseating groove disposed between the protruding units, wherein the wireis seated in the seating groove.

The wire may be coupled to the clip units in an inserted and fittedmanner.

Yet another aspect of the present invention provides a motor including arotating shaft, a rotor coupled to the rotating shaft, a commutatorcoupled to the rotating shaft, a stator disposed inside the rotor, ahousing disposed at an outside of the stator, and a cover assembly whichcovers the housing, wherein the cover assembly includes a brush assemblydisposed to be in contact with the commutator; a capacitor connected tothe brush assembly; and a ground terminal connected to the capacitor,wherein the ground terminal includes a body unit, a ground unit formedin the body unit, a clip unit formed in the body unit, and a couplingunit formed in the body unit, wherein a part of the body unit is cut andbent in a first direction to form the ground unit, a part of the bodyunit is bent in a second direction which is a direction different fromthe first direction to form the clip unit into which a wire is inserted,and the coupling unit is extended from the body unit and has aprotrusion.

The cover assembly may further include a connector to which an externalpower source is connected, and a terminal disposed in the connector maybe electrically connected to the capacitor.

The ground unit may come into contact with an inner surface of thehousing.

Advantageous Effects

A ground terminal according to embodiments is provided with a clip unitso that a wire of a capacitor can be fixed in a pre-assembled state,thereby providing an advantageous effect in which an assembling processis simple.

A ground terminal according to embodiments is provided with a clip unitin which a wire of a capacitor can be coupled in an inserted and fittedmanner, thereby providing an advantageous effect of increasing acoupling force between the capacitor and a ground terminal.

That is, the ground terminal can fix the wire of the capacitor so thatthe wire of the capacitor does not move, thereby enabling an automationprocess rather than manual operations.

Thus, the assembly process of a motor can be simplified through theautomation process.

The present invention provides an advantageous effect of significantlyreducing scraps of a sheet metal material forming a ground terminal byimplementing a ground unit by cutting a part of an upper portion of abody unit and implementing clip units on both sides of a coupling unit,which is implemented on a lower portion of a body unit, with thecoupling unit interposed therebetween.

DESCRIPTION OF DRAWINGS

FIG. 1 is a view illustrating a motor according to embodiments.

FIG. 2 is a perspective view illustrating a cover assembly according toembodiments.

FIG. 3 is a bottom perspective view illustrating a cover assemblyaccording to a first embodiment.

FIG. 4 is a view illustrating coupling of a ground terminal and a coverplate of the cover assembly according to the first embodiment.

FIG. 5 is a perspective view of the ground terminal according to thefirst embodiment.

FIG. 6 is a front view of the ground terminal according to the firstembodiment.

FIG. 7 is a side view of the ground terminal according to the firstembodiment.

FIG. 8 is a view illustrating a ground unit, which comes into contactwith a housing of the motor according to the embodiments, of the groundterminal according to the first embodiment.

FIG. 9 is a bottom perspective view illustrating a cover assemblyaccording to a second embodiment.

FIG. 10 is a view illustrating a ground terminal, into which a wire isinserted, according to the second embodiment.

FIG. 11 is a perspective view of the ground terminal according to thesecond embodiment.

FIG. 12 is a front view of the ground terminal according to the secondembodiment.

FIG. 13 is a side view of the ground terminal according to the secondembodiment.

FIG. 14 is a view illustrating a ground unit, which comes into contactwith the housing of the motor according to the embodiments, of theground terminal according to the second embodiment.

FIG. 15 is a view illustrating a first modified example of the groundterminal according to the second embodiment.

FIG. 16 is a view illustrating a second modified example of the groundterminal according to the second embodiment.

FIG. 17 is a view illustrating a third modified example of the groundterminal according to the second embodiment.

MODES OF THE INVENTION

Since the present invention may be variously changed and have variousembodiments, embodiments will be exemplified in the drawings anddescribed. However, the present invention is not limited to theparticular embodiment, and includes all changes, equivalents, andsubstitutes falling within the spirit and the scope of the presentinvention.

Although the terms encompassing ordinal numbers such as first, second,etc. may be used to describe various elements, these elements are notlimited by these terms. The terms are only used to distinguish oneelement from another. For example, a first element could be termed asecond element, and similarly, a second element could be termed a firstelement without departing from the scope of the present invention. Theterm “and/or” includes combinations of one or all of a plurality ofassociated listed items.

When predetermined components are mentioned to be “linked,” “coupled,”or “connected” to other components, the components may be directlylinked or connected to other components, but it should be understoodthat additional components may be “linked,” “coupled,” or “connected”therebetween. However, when the predetermined components are mentionedto be “linked,” “coupled,” or “connected” to other components, it shouldbe understood that no additional components exist between theabove-described components.

In the description of the embodiments, a term “on” or “under” in a casein which one predetermined component is disclosed to be formed “on” or“under” the other component includes both a case in which the twocomponents are directly in contact with each other and a case in whichat least one other component is formed to be disposed between the twocomponents. Further, the term “on” or “under” may also include terms“upward direction” and “downward direction” with respect to onecomponent.

The terminology provided herein is merely used for the purpose ofdescribing particular embodiments and is not intended to be limiting ofexemplary embodiments of the present invention. The singular form isintended to also include the plural form, unless the context clearlyindicates otherwise. Throughout the application, it should be understoodthat the terms “comprise,” “have,” and the like are used herein tospecify the presence of stated features, numbers, steps, operations,elements, components or combinations thereof, but do not preclude thepresence or addition of one or more other features, numbers, steps,operations, elements, components, or combinations thereof.

Unless otherwise defined, all terms including technical or scientificterms used in the present invention have meanings the same as those ofterms generally understood by those skilled in the art. Generally usedterms defined in a dictionary should be interpreted to have meanings thesame as meanings in the context of the related art and are notinterpreted as ideal or excessively formal meanings unless the presentinvention clearly defines otherwise.

Hereinafter, the embodiments will be described in detail with referenceto the accompanying drawings, the same reference numerals are applied tothe same or corresponding components regardless of the drawing numeralsand overlapping descriptions will be omitted.

FIG. 1 is a view illustrating a motor according to embodiments.

Referring to FIG. 1, a motor 1 according to the embodiments may includea cover assembly 2 or 2 a, a housing 10, a stator 20, a rotor 30, arotating shaft 40, and a commutator 50 according to the embodiment.Here, the cover assembly 2 or 2 a may be disposed to cover an open upperportion of the housing 10.

The cover assembly 2 or 2 a and the housing 10 may form an exterior ofthe motor 1.

Due to the cover assembly 2 or 2 a and the housing 10 being coupled toeach other, an accommodating space may be formed therein. Further, asshown in FIG. 1, the stator 20, the rotor 30, the rotating shaft 40, andthe commutator 50 may be disposed in the accommodating space.

The stator 20 causes electric interaction with the rotor 30 to inducerotation of the rotor 30. The stator 20 is coupled to an inner surfaceof the housing 10, and the stator 20 may include a plurality of magnets.The magnets form a rotating magnetic field together with a coil woundaround the rotor 30. The magnets may be disposed such that N and S polesare alternately positioned in a circumferential direction about therotating shaft 40.

Meanwhile, the stator 20 may be manufactured by coupling a plurality ofdivided cores to each other or may be manufactured in the form of asingle core composed of one cylinder.

The rotor 30 is disposed outside the stator 20. That is, the rotor 30may be disposed inside the stator 20.

The rotor 30 may include a rotor core and the coil. The rotor core maybe formed in a shape in which a plurality of plates, each in the form ofa thin steel plate, are laminated to each other, but the presentinvention is not necessarily limited thereto. For example, the rotorcore may be formed as a single item.

A plurality of slots may protrude from an outer circumferential surfaceof the rotor core. The slots may be disposed to protrude in a radialdirection with respect to a center of the rotor. Here, the slots may bedisposed to face the magnets. In addition, the coil is wound around eachof the slots. Here, an insulator may be mounted on the slot. Theinsulator insulates the slot from the coil.

When a current is supplied to the coil, electrical interaction betweenthe coil and the magnet is induced to rotate the rotor 30. When therotor 30 rotates, the rotating shaft 40 also rotates. Here, the rotatingshaft 40 may be supported by a bearing 60.

Hereinafter, a cover assembly 2 according to a first embodiment will bedescribed with reference to FIGS. 2 to 8.

FIG. 2 is a view illustrating an upper surface a cover plate, and FIG. 3is a view illustrating a lower surface of a cover assembly according tothe first embodiment. The cover assembly 2 according to the firstembodiment will be described with reference to FIGS. 2 and 3, whereinthe cover assembly 2 may include a cover plate 100, a connector 200having a terminal 210 disposed therein, a brush assembly 300, a chokecoil 400, a hook terminal 500, a capacitor 600, and a ground terminal700.

As shown in FIG. 3, the brush assembly 300, the choke coil 400, the hookterminal 500, the capacitor 600, and the ground terminal 700 may bedisposed on a lower surface of the cover plate 100.

Further, the terminal 210 of the connector 200, the brush assembly 300,the choke coil 400, the hook terminal 500, the capacitor 600, and theground terminal 700 may be electrically connected to each other. Here,the terminal 210, the choke coil 400, and the capacitor 600 of theconnector 200 may be electrically connected to each other using amember, such as a wire, and the hook terminal 500.

The cover plate 100 may be disposed to cover the open upper portion ofthe housing 10. As shown in FIGS. 2 and 3, the cover plate 100 may beformed in a circular disk shape. In addition, the cover plate 100 may beformed of an insulating material such as a mold.

A ground terminal 700 may be disposed on the lower surface of the coverplate 100.

Further, the cover plate 100 may include a boss unit 110 disposed toprotrude from the lower surface of the cover plate 100, a couplinggroove 120 formed in the boss unit 110 so that one side of the groundterminal 700 is coupled thereto, and a guide groove 130 configured toguide coupling of the ground terminal 700.

Here, the guide groove 130 may be formed on the lower surface of thecover plate 100 in a C-shape. As shown in FIG. 4, the guide groove 130may be formed in the boss unit 110 of the cover plate 100.

Accordingly, when the ground terminal 700 is assembled to the coverplate 100, the guide groove 130 may guide the coupling such that theground terminal 700 is disposed at a predetermined position. Further, aside surface of the guide groove 130 may support the ground terminal700.

The connector 200 allows power supplied from an external power supplydevice to be supplied to the motor 1. As shown in FIGS. 2 and 3, theconnector 200 may be disposed to pass through the cover plate 100. Aterminal 210 may be disposed in the connector 200. Accordingly, thepower supplied from the outside may be supplied to the brush assembly300 or the like of the motor 1 through the terminal 210.

The brush assembly 300 may include a brush 310, a case 320 including thebrush 310 therein, and an elastic member 330 included in the case 320 toprovide an elastic force. Accordingly, the brush 310 may be disposed tocome into contact with the commutator 50. Thus, the brush 310 maytransmit the power supplied through the commutator 50 to the coil.

Meanwhile, the brush assembly 300 is connected to one side of the chokecoil 400. Further, the other side of the choke coil 400 is connected tothe capacitor 600 through the hook terminal 500.

The choke coil 400 may shield electromagnetic waves which are emittedfrom the motor 1 to the outside.

The hook terminal 500 may be disposed between the connector 200 and thechoke coil 400. Further, the hook terminal 500 may be electricallyconnected to the terminal 210 of the connector 200 and the choke coil400.

The capacitor 600 may be electrically connected to the hook terminal500. Further, the capacitor 600 may be electrically connected to theground terminal 700 through a wire 610. Accordingly, the terminal 210 ofthe connector 200 to which an external power source is connected may beelectrically connected to the ground terminal 700.

Further, the capacitor 600 may emit noise through the ground terminal700.

The ground terminal 700 may be electrically connected to the capacitor600.

FIG. 5 is a perspective view of the ground terminal according to thefirst embodiment, FIG. 6 is a front view of the ground terminalaccording to the first embodiment, and FIG. 7 is a side view of theground terminal according to the first embodiment. FIGS. 5 to 7 clearlyillustrate only the main features in order to conceptually clearlyunderstand the ground terminal according to the embodiments, and as aresult, various modifications of the illustration are expected, and thescope of the embodiments need not be limited by the specific shapeillustrated in the drawings.

Referring to FIGS. 5 to 7, the ground terminal 700 according to thefirst embodiment may include a body unit 710, a ground unit 720, clipunits 730, and a coupling unit 740. Further, the body unit 710, theground unit 720, the clip units 730, and the coupling unit 740 may beformed by bending a single sheet metal material. Here, the wire 610 ofthe capacitor 600 may be coupled to the clip unit 730 in an inserted andfitted manner.

The body unit 710 forms a body of the ground terminal 700. As shown inFIG. 5, the body unit 710 may be formed in a bar shape.

The ground unit 720 may be formed to extend from one region of an upperend of the body unit 710. Here, the ground unit 720 may be formed at acenter of the body unit 710 in a longitudinal direction (widthdirection).

Further, the ground unit 720 may be bent in a first direction (R in FIG.7). Here, the first direction (the R in FIG. 7) may be a directiontoward the housing 10 with respect to the radial direction when theground terminal 700 is coupled to the cover plate 100. Further, theground unit 720 may be elastically deformed. Accordingly, the groundunit 720 may come into contact with the inner surface of the housing 10.

Referring to FIG. 8, the wire 610 is connected to the clip unit 730 in astate in which the coupling unit 740 is coupled to the coupling groove120 and a state in which the ground unit 720 comes into contact with theinner surface of the housing 10. The ground unit 720 is bent to form acurved surface so that the ground unit 720 is smoothly inserted into theinner surface of the housing 10 when the cover plate 100 covers thehousing 10. Further, the ground unit 720 is elastically deformed whenthe cover plate 100 covers the housing 10.

The clip unit 730 may be formed by being bent from both side ends of thebody unit 710 in a second direction (F in FIG. 7). Here, the seconddirection (the F in FIG. 7) may be a direction toward the rotating shaft40 with respect to the radial direction when the ground terminal 700 iscoupled to the cover plate 100. Thus, the second direction may be adirection opposite to the first direction.

When viewed from the upper portion of the ground terminal 700, the bodyunit 710 and the clip units 730 may be formed in a C-shape. Further,when the ground terminal 700 is coupled to the cover plate 100, the bodyunit 710 and the clip units 730 may be guided by the guide groove 130 tobe disposed at the predetermined position. Further, the side surface ofthe guide groove 130 may support the body unit 710 and clip units 730 ofthe ground terminal 700.

Here, the clip unit 730 may be disposed such that a part thereof isdeviated from the boss unit 110 in the second direction. Specifically,the clip unit 730 may be disposed such that the part thereof is exposedfrom the guide groove 130 in the second direction.

Referring to FIGS. 5 to 7, the clip unit 730 may include a body 731, twoprotruding units 732 formed to extend from an upper portion of the body731, and a seating groove 733 formed between the two protruding units732. Further, the clip unit 730 may include fixing units 734 formed onthe protruding units 732 to protrude in directions which face eachother.

The body 731 is formed in a plate shape, and one side thereof may beconnected to the body unit 710.

The protruding units 732 may protrude from the upper portion of the body731. Further, since the protruding units 732 are disposed to be spacedapart from each other, the seating groove 733 may be formed between theprotruding units 732.

The wire 610 may be seated in the seating groove 733. Here, the wire 610may be seated in the seating groove 733 and then fixed to the clip units730 by a method such as welding.

The wire 610 is fixed to the clip units 730 by a method such as welding,but the embodiment is not necessarily limited thereto. For example, whenthe fixing units 734 are formed, the wire 610 may be fixed to theseating groove 733 by the fixing units 734. Accordingly, movement of thewire 610 due to an external force may be prevented.

That is, the fixing units 734 may prevent the wire 610 disposed in theseating groove 733 from being separated therefrom.

Accordingly, when the wire 610 is inserted into the clip unit 730, astate in which the capacitor 600 is coupled to the ground terminal 700is maintained, thus an inconvenience in which a worker has to hold thewire 610 for welding work may be eliminated. The structure in which thecapacitor 600 is coupled to the ground terminal 700 as described aboveis a highly advantageous structure for implementing an automationprocess.

Further, since the wire 610 is fixed to the clip unit 730 by the fixingunits 734, a separate welding work may not be required. However, thewelding work may be performed in parallel to secure an electricalconnection between the wire 610 and the clip unit 730.

The coupling unit 740 is formed to extend from a lower portion of thebody unit 710. Further, the coupling unit 740 may be disposed to becoplanar with the body unit 710.

The coupling unit 740 is coupled to the cover plate 100. Specifically,the cover plate 100 may be provided with the protruding boss unit 110,and the coupling groove 120 concavely formed may be formed in the bossunit 110. Accordingly, the coupling unit 740 is inserted into thecoupling groove 120 to fix the body unit 710 to the cover plate 100.

The coupling unit 740 may further include protrusions 741. Theprotrusions 741 increase a coupling force between the coupling unit 740and the coupling groove 120. Here, each of the plurality of protrusions741 is formed in a sawtooth shape, and thus it may be configured suchthat it is difficult for the coupling unit 740 to come out once it isinserted into the coupling groove 120.

Hereinafter, a cover assembly 2 a according to a second embodiment willbe described with reference to FIGS. 2 and 9 to 17.

In a description of the cover assembly 2 a according to the secondembodiment, the same components as those of the cover assembly 2according to the first embodiment are denoted by the same referencenumerals, and thus detailed descriptions thereof will be omitted.

FIG. 2 is the perspective view illustrating the cover assembly accordingto embodiments, FIG. 9 is a bottom perspective view illustrating a coverassembly according to the second embodiment, and FIG. 10 is a viewillustrating a ground terminal, into which a wire is inserted, accordingto the second embodiment.

The cover assembly 2 a according to the second embodiment will bedescribed with reference to FIGS. 2, 9, and 10. The cover assembly 2 amay include a cover plate 100, a connector 200 having a terminal 210disposed therein, a brush assembly 300, a choke coil 400, a hookterminal 500, a capacitor 600, and a ground terminal 700 a. Here, theground terminal 700 a may be provided as a ground terminal 700 aaccording to the second embodiment shown in FIGS. 11 to 13.

As shown in FIGS. 9 and 10, the brush assembly 300, the choke coil 400,the hook terminal 500, the capacitor 600, and the ground terminal 700 amay be disposed on the lower surface of the cover plate 100.

Further, the terminal 210 of the connector 200, the brush assembly 300,the choke coil 400, the hook terminal 500, the capacitor 600, and theground terminal 700 a may be electrically connected to each other. Here,the terminal 210, the choke coil 400, and the capacitor 600 of theconnector 200 may be electrically connected to each other using amember, such as a wire, and the hook terminal 500.

For example, the ground terminal 700 a and the brush assembly 300 arecoupled to the lower surface of the cover plate 100. The brush assembly300 is connected to the choke coil 400 and the capacitor 600. The wire610 of the capacitor 600 is connected to the ground terminal 700 a.Further, the capacitor 600 is connected to the terminal 210. Theterminal 210 is disposed in the connector 200 formed on the uppersurface of the cover plate 100. An external power source may beconnected to the connector 200. When the external power is connected tothe connector 200, electricity is supplied to the brush assembly 300through the terminal 210, the capacitor 600, and the choke coil 400. Thebrush assembly 300 supplies the electricity to the coil by passingthrough the commutator 50.

The brush assembly 300 may include the brush 310, the case 320 includingthe brush 310 therein, and the elastic member 330 included in the case320 to provide an elastic force. The brush 310 may be disposed to comeinto contact with the commutator 50.

Meanwhile, the brush assembly 300 is connected to one side of the chokecoil 400. Further, the other side of the choke coil 400 is connected tothe capacitor 600 through the hook terminal 500.

Referring to FIG. 10, the capacitor 600 is connected to the groundterminal 700 a. The wire 610 of the capacitor 600 is inserted into theground terminal 700 a. The ground terminal 700 a is coupled to the coverplate 100. The boss unit 110 including the coupling groove 120 intowhich the ground terminal 700 a is inserted may be provided to protrudefrom the cover plate 100.

FIG. 11 is a perspective view of the ground terminal according to thesecond embodiment, FIG. 12 is a front view of the ground terminalaccording to the second embodiment, and FIG. 13 is a side view of theground terminal according to the second embodiment. FIGS. 11 to 13clearly illustrate only the main features in order to conceptuallyclearly understand the embodiments, and as a result, variousmodifications of the illustration are to be expected, and the scope ofthe embodiments need not be limited by the specific shape illustrated inthe drawings.

Referring to FIGS. 11 to 13, the ground terminal 700 a may include thebody unit 710, the ground unit 720, clip units 730 a, and the couplingunit 740. The body unit 710, the ground unit 720, the clip units 730 a,and the coupling unit 740 may be separately described according to theirshapes and functional properties but are one component verticallyconnected to each other. Further, the body unit 710, the ground unit720, the clip units 730 a, and the coupling unit 740 may be formed bybending a single sheet metal material.

The body unit 710 forms a body of the ground terminal 700 a.

A part of an upper portion of the body unit 710 may be cut to an upperedge rim thereof, and the cut portion may be bent in a first direction(R in FIG. 13) to form the ground unit 720. Here, the first direction (Rin FIG. 13) may be a direction toward the housing 10 with respect to aradius direction when the ground terminal 700 a is coupled to the coverplate 100. The ground unit 720 is elastically deformed. Further, theground unit 720 may come into contact with an inner surface of thehousing 10.

The clip units 730 a may be bent from an upper end 710 a of the bodyunit 710 in a second direction (F in FIG. 13). Here, the seconddirection (the F in FIG. 13) may be a direction toward the rotatingshaft 40 with respect to the radius direction when the ground terminal700 a is coupled to the cover plate 100.

The clip unit 730 a may be bent to form a hole into which the wire 610of the capacitor 600 is inserted. The wire 610 is inserted into the clipunit 730 a in the same direction as A in FIG. 11. When the wire 610 isinserted into the clip unit 730 a, a state in which the capacitor 600 iscoupled to the ground terminal 700 a is maintained, thus aninconvenience in which a worker has to hold the wire 610 for weldingwork may be eliminated. The structure in which the capacitor 600 iscoupled to the ground terminal 700 a as described above is a highlyadvantageous structure for implementing an automation process.

Meanwhile, the hole of the clip unit 730 a may be processed inconsideration of a diameter of the wire 610 such that the wire 610 doesnot move after the wire 610 is inserted into the clip unit 730 a.

When there are two brush assemblies 300, the clip unit 730 a may includea first clip 730 a-1 and a second clip 730 a-2. The ground unit 720 maybe formed on a center of the body unit 710 in a width direction.Further, the first clip 730 a-1 and the second clip 730 a-2 may bedisposed on both sides of the ground unit 720 with the ground unit 720interposed therebetween. The wire 610 of the capacitor 600, which isconnected to one of the two brush assemblies 300, may be connected tothe first clip 730 a-1. The wire 610 of the capacitor 600, which isconnected to the other one of the two brush assemblies 300, may beconnected to the second clip 730 a-2.

The coupling unit 740 is formed to extend from a lower portion of thebody unit 710. The coupling unit 740 is coupled to the cover plate 100.Specifically, the cover plate 100 may be provided with the protrudingboss unit 110 (see FIG. 10), and the coupling groove 120 (see FIG. 10)may be formed in the boss unit 110 (see FIG. 10). Accordingly, thecoupling unit 740 is inserted into the coupling groove 120 (see FIG. 10)to fix the body unit 710 and the clip units 730 to the cover plate 100.

The coupling unit 740 includes the protrusions 741. The protrusions 741increase a coupling force between the coupling unit 740 and the couplinggroove 120 (see FIG. 10). The protrusions 741 are formed in a sawtoothshape, and thus it may be configured such that it is difficult for thecoupling unit 740 to come out once it is inserted into the couplinggroove 120.

FIG. 14 is a view illustrating a ground unit, which comes into contactwith the housing of the motor according to the embodiments, of theground terminal according to the second embodiment.

Referring to FIG. 14, the wire 610 is connected to the clip unit 730 ina state in which the coupling unit 740 is coupled to the coupling groove120 and a state in which the ground unit 720 comes into contact with theinner surface of the housing 10. The ground unit 720 is bent to form acurved surface so that the ground unit 720 is smoothly inserted into theinner surface of the housing 10 when the cover plate 100 covers thehousing 10. Further, the ground unit 720 is elastically deformed whenthe cover plate 100 covers the housing 10.

FIG. 15 is a view illustrating a first modified example of the groundterminal according to the second embodiment.

Referring to FIG. 15, in a ground terminal 700 a according to the firstmodified example, a first clip 730 a-1 and a second clip 730 a-2 may bebent from a lower end 710B of a body unit 710. The first clip 730 a-1and the second clip 730 a-2 are positioned on both sides of a couplingunit 740 with the coupling unit 740 interposed therebetween in anexploded shape of a ground terminal 700 a. Accordingly, the structure ofthe ground terminal 700 a according to the first modified example is astructure which may greatly reduce an amount of scraps of the sheetmetal material.

FIG. 16 is a view illustrating a second modified example of the groundterminal according to the second embodiment.

Referring to FIG. 16, in a ground terminal 700 a according to the secondmodified example, a first clip 730 a-1 and a second clip 730 a-2 may bebent from side ends 710C of a body unit 710. Corresponding to the groundterminal 700 a having such a structure, a connection direction of a wire610 connected to the first clip 730 a-1 and the second clip 730 a-2 maybe changed from an upward direction to a downward direction with respectto the ground terminal 700 a, or from the downward direction to theupward direction with respect to the ground terminal 700 a. The groundterminal 700 a according to the second modified example may be appliedaccording to a structure of a cover plate 100 and a type and position ofa capacitor 600.

FIG. 17 is a view illustrating a third modified example of the groundterminal according to the second embodiment.

Referring to FIG. 17, in a ground terminal 700 a according to the thirdmodified example, a first clip 730 a-1 and a second clip 730 a-2 may beformed by bending a cut portion in which a part of a body unit 710 iscut. Since the first clip 730 a-1 and the second clip 730 a-2 areimplemented in the body unit 710 in the exploded shape of the groundterminal 700 a, the amount of scraps of the sheet metal material may begreatly reduced.

Although the above-described descriptions are described with referenceto the embodiments of the present invention, it should be understoodthat those skilled in the art may be capable of variously modifying andchanging within the spirit and the scope of the present inventiondisclosed in the claims which will be described below. Further,differences related to modifications and changes should be understood tobe included in the scope of the present invention defined in theappended claims.

EXPLANATION OF REFERENCE NUMERALS

1: motor, 2, 2 a: cover assembly, 10: housing, 20: stator, 30: rotor,40: rotating shaft, 50: commutator, 60: bearing, 100: cover plate, 110:boss unit, 120: coupling groove, 130: guide groove, 200: connector, 210:terminal, 300: brush assembly, 400: choke coil, 500: stator, 600:capacitor, 610: wire, 700, 700 a: ground terminal, 710: body unit, 720:ground unit, 730, 730 a: clip unit, 740: coupling unit, 741: protrusion

1-2. (canceled)
 3. A ground terminal comprising: a body unit; a groundunit formed in the body unit; a clip unit formed in the body unit; and acoupling unit formed in the body unit, wherein a part of the body unitis cut and bent in a first direction to form the ground unit, and a partof the body unit is bent in a second direction that is a directiondifferent from the first direction to form the clip unit into which awire is inserted.
 4. The ground terminal of claim 3, wherein the clipunit includes a first clip and a second clip that are disposed on bothsides of the ground unit.
 5. The ground terminal of claim 4, wherein thefirst and second clips are bent from an upper end of the body unit. 6.The ground terminal of claim 4, wherein the first and second clips arebent from a lower end of the body unit.
 7. The ground terminal of claim4, wherein the first and second clips are bent from side ends of thebody unit.
 8. The ground terminal of claim 4, wherein the first andsecond clips are formed by cutting and bending a part of the body unit.9. The ground terminal of claim 3, wherein the ground unit is formed ata center of the body unit in a width direction.
 10. The ground terminalof claim 3, wherein the coupling unit is formed to be coplanar with thebody unit.
 11. The ground terminal of claim 10, wherein the couplingunit further includes a protrusion having a sawtooth shape. 12.(canceled)
 13. A cover assembly comprising: a cover plate; a brushassembly coupled to the cover plate; a ground terminal coupled to thecover plate; and a capacitor coupled to the cover plate and connected tothe ground terminal and the brush assembly; wherein the ground terminalincludes a body unit, a ground unit formed by cutting a part of the bodyunit and bending in a first direction, a clip unit formed by bending apart of the body unit in a second direction that is a directiondifferent from the first direction, and to which a wire is coupled bybeing inserted; and a coupling unit configured to extend from the bodyunit and including a protrusion.
 14. The cover assembly of claim 13,wherein the cover plate includes a coupling groove that is concavelyformed and into which the coupling unit is inserted.
 15. The coverassembly of claim 14, wherein the cover plate further includes a guidegroove configured to guide coupling of the ground terminal when thecoupling unit is coupled to the coupling groove.
 16. The cover assemblyof claim 13, further comprising a connector to which an external powersource is connected, wherein a terminal disposed in the connector iselectrically connected to the capacitor.
 17. The cover assembly of claim16, wherein the terminal is disposed to pass through the cover plate.18. (canceled)
 19. A motor comprising: a rotating shaft; a rotor coupledto the rotating shaft; a commutator coupled to the rotating shaft; astator disposed inside the rotor; a housing disposed at an outside ofthe stator; and a cover assembly that covers the housing, wherein thecover assembly includes a brush assembly disposed to be in contact withthe commutator, a capacitor connected to the brush assembly, and aground terminal connected to the capacitor, wherein the ground terminalincludes a body unit, a ground unit formed in the body unit, a clip unitfowled in the body unit, and a coupling unit formed in the body unit,wherein a part of the body unit is cut and bent in a first direction toform the ground unit, a part of the body unit is bent in a seconddirection that is a direction different from the first direction to formthe clip unit into which a wire is inserted, and the coupling unit isextended from the body unit and has a protrusion.
 20. (canceled)